JP2000055124A - Aseismatic rubber vibration isolator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide aseismatic rubber vibration isolation of small size which excels in the vibration isolating performance and is equipped with a stopper function. SOLUTION: By means of a single piece molding, an upper plate 2 and a lower plate 3 are adhered vulcanizedly to the oversurface and undersurface of a resilient body 1 of rubber, and a stopper pin 4 is extended from the upper plate 2 to be inserted loosely into a through-hole 3a provided in the lower plate 3, where the end part 4a is furnished with a stopper plate 5, wherein the lower plate 3 having the through-hole 3a is formed into a protrusion relative to the upper plate 2, and it is arranged so that the stopper plate 5 and the end 4a of stopper pin 4 are accommodated in a recess 3b formed on the opposite side even when the resilient body 1 is in maximum deformation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an anti-vibration rubber,
In particular, the present invention relates to an anti-vibration rubber for earthquake resistance having a vibration-proof function and a stopper function against a large external force such as an earthquake.

[0002]

2. Description of the Related Art For example, in a vibration damping rubber device disclosed in Japanese Utility Model Application Laid-Open No. 64-20549, a cover member is attached to the outer periphery of upper and lower plates of the vibration damping rubber, and the cover member is attached to each edge. By engaging, a stopper function is provided in the up, down, left, and right directions.

In this vibration isolating rubber device, since cover members are respectively attached to the outer peripheries of the upper and lower plates of the vibration isolating rubber, there has been a problem that the outer shape becomes large and the cost increases.

On the other hand, in the case where a stopper mechanism is provided inside the vibration isolating rubber, there is a vibration isolating rubber disclosed in Japanese Utility Model Laid-Open No. 6-35698.

In this anti-vibration rubber for earthquake resistance, the stopper mechanism is formed by screwing a member having a thread formed on the outer periphery into a member having a female thread formed on the inner peripheral surface. Therefore, there is a problem that the clearance between the members is small, and vibration is easily transmitted.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and is intended to reduce the price of an anti-vibration rubber having a small size, excellent anti-vibration performance and provided with a stopper function. It is provided without inviting.

[0007]

According to the present invention, an upper plate and a lower plate are integrally formed on an upper surface and a lower surface of a rubber-like elastic body by vulcanizing and bonding, respectively, and one of the upper plate and the lower plate is formed. From the above, a stopper pin is extended so as to loosely insert a through hole provided on the other side, and in an anti-vibration rubber having a stopper plate at an end of the stopper pin, the upper plate or the lower plate having the through hole is provided. One is formed to be convex with respect to the other, and the end portions of the stopper plate and the stopper pin are accommodated in the concave portion formed on the opposite side even during the maximum deformation of the rubber-like elastic body.

[0008]

According to the present invention, the stopper pin loosely inserts into the through hole, and the stopper plate and the end of the stopper pin are
At the time of the maximum deformation of the rubber-like elastic body, since it is configured to fit in the concave portion, the problem that vibration is easily transmitted,
There is no problem that the external shape becomes large.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

[First Embodiment] FIG. 1 is a longitudinal sectional view showing a first embodiment of an anti-vibration rubber for earthquake resistance according to the present invention. As shown in this figure, in the present invention, a lower plate having a through hole is formed in a convex shape with respect to an upper plate, and a stopper pin is extended from the upper plate so as to loosely insert the through hole, A stopper plate is provided at the end of the stopper pin so that the ends of the stopper plate and the stopper pin are accommodated in the concave portion formed on the opposite side of the convex portion of the lower plate even during the maximum deformation of the rubber-like elastic body. It is characterized by having done.

That is, a stopper pin 4 is fixed to the upper plate 2, and a device mounting screw portion 4b is provided at an upper end thereof. On the other hand, a central portion of the lower plate 3 is formed in a convex shape so as to form a concave portion 3b, and a through hole 3a is formed in the center of the concave portion 3b.
The lower end 4a of the stopper pin is loosely inserted into the through hole 3a from the direction formed in the convex shape, and a rubber-like elastic body is vulcanized between the upper plate and the lower plate 3 by integral molding. Glued. Further, a stopper plate 5 is fixed to the lower end 4a of the stopper pin.

Then, using the mounting hole 3d of the lower plate 3,
It is fixed to a foundation or the like, and is used by attaching the device using the device mounting screw portion 4b.

Here, since a sufficient clearance C1 is secured between the stopper pin 4 and the through hole 3a, no vibration is transmitted from the stopper.

FIG. 2 shows a state in which the rubber-like elastic body 1 has been maximally deformed in the vertical direction. At this time, a clearance C2 is secured between the lower end 4a of the stopper pin 4 and the installation surface 3c of the lower plate 3. That is, even when the rubber-like elastic body 1 is maximally deformed, the stopper plate 5 and the lower end 4a of the stopper pin 4 are accommodated in the recess 3b, and are small and easy to mount.

[Other Embodiments] In the above-described first embodiment, the stopper pin 4 is fixed to the upper plate 2 and the concave portion 3b is formed in the center of the lower plate 3. May be. The upper end of the stopper pin 4 is provided with a device mounting screw portion 4b, but a specific shape such as a structure having a mounting hole without a screw portion can be appropriately changed.

[0016]

According to the present invention, the stopper is incorporated in the vibration isolating rubber, and the clearance of the stopper portion can be sufficiently ensured. It can be provided without increasing the price.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment of an anti-vibration rubber for earthquake resistance according to the present invention.

FIG. 2 is a diagram showing a state in which a rubber-like elastic body is deformed maximum in the vertical direction.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rubber-like elastic body 2 Upper plate 3 Lower plate 3a Through hole 3b Depression 3c Installation surface 4 Stopper pin 4a End 5 Stopper plate C1 Clearance C2 Clearance

Claims (1)

[Claims] 1. An upper plate and a lower plate are respectively vulcanized and bonded to the upper and lower surfaces of a rubber-like elastic body by integral molding so that through holes provided in one of the upper plate and the lower plate are inserted into the other. An anti-vibration rubber having a stopper pin extending and having a stopper plate at an end of the stopper pin, wherein one of the upper plate and the lower plate having the through hole is formed in a convex shape with respect to the other, and the opposite side is formed. Wherein the end portions of the stopper plate and the stopper pin are accommodated in the concave portion formed at the time of the maximum deformation of the rubber-like elastic body.